JPH0571203U - Tools for railway track adjustment machines - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a tool for a railway track adjusting machine capable of replacing worn parts. [Structure] A shaft 1 and a blade 2 attached to the shaft 1 by pressure fitting. Thus, the highly worn blade 2 can be replaced with a new one and the old shaft 1 can be reused. In order to detachably connect the shaft 1 and the blade 2, the lower end of the shaft 1 is tapered,
And has a trapezoidal cross section, while the plate-shaped blade 2 has two flanges 4, 4'to form a slot for receiving the lower end of the shaft, in which slot the lower part of the shaft 1 is A force fit is achieved by inserting the ends firmly from top to bottom.

Description

[Detailed description of the device]

When adjusting a railroad track or the like for warpage or the like, a very complicated machine is used. These devices used to pack the track in place are rather simple spade-type tools. Railroad rail sleepers are stationary on and in the crushed stone floor. The tool is pushed with great force into the crushed stone bed under the sleepers and toward the sleepers. Due to the large amount of wear that the crushed stone material causes the tool to wear, the tool usually wears out within a few days. The worn part of the tool is the blade or working surface. When the blade wears out, the entire tool, including the shaft integral with it, must be replaced.

The present invention is intended to solve the problem of making it possible to replace the worn parts themselves. Of course, the shaft will wear as well as the blade. However, shaft wear is only one of the best sources of blade wear. So by the time the shaft is worn to the point where it needs to be replaced, it can be used in common with as many blades as it can pick up.

Hereinafter, the tool of the present invention will be described with reference to FIGS. 1 to 4. According to the principles of the present invention, the tool is manufactured with the shaft 1 and the blade 2 as two separate parts.

The supporting shaft 1 is manufactured by forging, casting or any other suitable method. Of course, the upper end of the shaft is shaped to fit the machine for which it is intended. The lower end 3 of the shaft 1 having the first axis 12 is substantially trapezoidal in cross section 3A, 3B and has an angle β between the non-parallel sides, while the lower end 3 helicopter 5, The 5'are tapered downward at an angle α to each other. Such lower end 3 of the shaft 1 is formed as part of a press-fit joint between the shaft 1 and the blade 2.

The cross section 3A, 3B of the lower end 3 of the shaft 1 has a portion 3C in which the helicopters 5, 5'of which are chamfered.

The blade 2 having the second axis 28 is manufactured by forging, casting or any other suitable method. The flange 2, 4'is manufactured on the blade 2 as one and the same piece. The two flanges 4, 4'are located on opposite sides of the plane of symmetry 40 and form a downward taper with an angle γ. However, the portions where the planes perpendicular to the second axis 28 intersect the flanges 4 and 4'are parallel to each other.

After the blade 2 with the flange 4, 4 ′ is formed as described above, the blade 2 with the flange 4, 4 ′ is bent up so that the two flanges 4, 4 ′ move away from the rear surface of the blade 2. Accordingly, the taper with an angle δ is formed so as to approach each other.

After forming as described above, the blade 2 may be flat or curved. In the latter case, when the blade 2 is bent up so that it is substantially flat, the flanges 4, 4'form an angle δ. If, after being formed, the blade 2 is allowed to be flat, the flanges 4, 4'should be bent up to form an angle δ.

When the flanged blade 2 is manufactured by casting or any other suitable method, the flanges 4, 4 ′ have a nominal surface of the blade 2 which coincides with the longitudinal axis of the tool when it is fitted together. 40 should be formed at an angle γ with respect to one another and at an angle δ with respect to each other in the direction of the plane of symmetry 40 which coincides with the longitudinal axis of the tool when fitted together. is there.

The upper end of the shaft 1 is adapted to the machine on which the tool is to be fitted. The cross-sectional shape of the lower end 3 of the shaft 1 is substantially trapezoidal 3A, 3B, the bottom corner of the trapezoid having a chamfered portion 3C. The lower end 3 of the shaft 1 is such that its widest part, the helicopters 5, 5 ', taper downwards to form an angle α. This angle α is ≦ 10 °. The angle β between the non-parallel side surfaces of the cross sections 3A and 3B is 30 ° to 50 °.

The blade 2 is mainly composed of a rectangular plate, and has two flanges 4 and 4 ′ on the back surface thereof at a predetermined distance. The vertical cross section of the blade 2 is generally formed outside the flanges 4,4 'in a downwardly tapered trapezoid, while the flanges 4,4' are inclined downwards towards the blade 2 at their lower ends. It has a substantially rectangular shape. The blade 2 is of equal thickness along the bottom helicopter.

The helices 5, 5 ′ at the lower end 3 of the shaft 1 make an angle α of ≦ 10 ° with each other and the non-parallel sides of the cross sections 3 A, 3 B make an angle β of 30 ° to 50 ° with each other. ing. Further, the flanges 4, 4'of the blade 2 form an angle γ of ≤10 ° and are inclined so as to approach each other at an angle δ of 30 ° to 50 ° to form a slot therebetween. .. By the way, α = γ, and β ≦ δ, the difference between δ and β does not exceed 2 °, and is preferably 1 °, and between the helicopters 5 and 5 ′. The distance is roughly the same as the distance between the flanges 4 and 4 '. The design of the shaft 1 and the blade 2 is such that when the shaft 1 is strongly inserted into the slot formed between the flanges 4, 4 ′ and the blade 2, a force fit is created between the lower end 3 of the shaft 1 and the blade 2. Make sure you achieve it.

The relationship between the angles will be described in more detail. First, basically, in order for the lower end 3 of the shaft 1 to fit in the slot between the flanges 4, 4'of the blade 2 so that the required pressure fit can be achieved, the angles α and γ must be equal. I won't. Then, if the angle β is greater than the angle δ, the helicopters 5, 5'will cause the flanges 4, 4'to move more than the inner surfaces of the flanges 4, 4 'exert pressure on the non-parallel sides of the lower end 3 of the shaft 1. It will hit the corner of the base of the. On the contrary, when the angle β is slightly smaller than δ, the inner surfaces of the flanges 4, 4 ′ exert pressure on the non-parallel side surfaces of the lower end of the shaft 1, and conversely the flanges 4, 4 ′ are elastically deformed. Allows pressure fitting. For this reason, β ≦ δ must be satisfied, but it is a result of technical experience that the difference between the angles β and δ is at most 2 degrees. If the angle β or δ is less than 30 degrees, the lower end 3 of the shaft 1 is more than the slot due to the relative lateral force between the blade 2 and the shaft 1 (force in the direction perpendicular to the back surface of the blade 2). There is a risk of getting out. This is because the flanges 4 and 4'approach in parallel, and it becomes difficult to hold the lower end 3 of the shaft 1 against the back surface of the blade 2 from the rear side. On the other hand, if the angle β or δ is larger than 50 degrees, the lower end 3 of the shaft 1 becomes flat and the strength becomes low. For this reason, the angles β and δ are larger than 30 degrees and smaller than 50 degrees.

The tool first fits the shaft 1 into the machine intended to use it, and then allows the blade 2 to enter the lower end 3 of the shaft 1 and temporarily fix it there (for example by means of a hammer). ) Is easily fitted into the machine. Then, the blade 2 is applied to, for example, a sleeper, and is firmly pushed into the shaft 1 by using the hydraulic device of the machine. Conversely, the blade 2 can be removed by releasing it from the shaft 1, for example using a heavy hammer. Now a new blade can be fitted as a replacement.

[Brief description of drawings]

FIG. 1 (a) is a side view showing a shaft of a tool of the present invention, and FIG. 1 (b) is a rear view thereof.

2 (a) is a rear view of the blade of the present invention, FIG. 2 (b) is a plan view thereof, and FIG. 2 (c) is a side view thereof.

FIG. 3 is a rear view of the blade of the tool of the present invention.

4 (a) is a sectional view taken along line IVa-IVa in FIG. 1, and FIG. 4 (b) is a sectional view taken along line IVb-IVb in FIG.

[Explanation of symbols]

1 shaft 2 blade 3 shaft lower end 4 flange 5 heli 12 first axis 28 second axis 40 symmetry plane α taper angle between helices at lower end of shaft β taper angle between side faces at lower end of shaft γ blade Taper angle between the flanges of the blades δ The taper angle between the flanges of the blade in the direction away from the back surface

Claims (4)

[Scope of utility model registration request] 1. An improved tool incorporated into a machine used to position railroad tracks and sleepers, comprising a first axis, an upper end adapted to be gripped by the machine, and a lower end. The lower end is tapered upwards and outwards from the first axis, the lower end being a supporting shaft whose cross-section is essentially trapezoidal, and the second axis, front, back And a blade member having a pair of flanges extending from the back surface and extending upward and forming an open slot, the lower end of the shaft facing the back surface of the blade member on the one side of the shaft. In the slot, the slot tapering upward and outwardly from the second axis and inwardly toward the center of the slot from the rear surface of the blade member toward the outer end of the flange. With taper Has a transverse cross section, and thus the lower end of the support shaft is press fit into the slot of the blade member to releasably secure the blade member to the support shaft for wear. Improved tool incorporated into a machine for use in positioning railroad tracks and sleepers, characterized in that it allows replacement of the blade elements and reuse of the supporting shaft. 2. The tool of claim 1, wherein the flange is integral with the blade member. 3. The lower end of the supporting shaft tapers at an angle α, and the slot of the blade member tapers upwardly at an angle γ essentially equal to the angle α. And the cross-section of the lower end of the shaft is tapered at an angle β and the cross-section of the slot is tapered at an angle δ essentially equal to the angle β. 1 tool. 4. Each of the angles β and δ is 30 to 5
Is in the range of 0 degrees, β is less than or equal to δ,
The tool of claim 3 wherein β and δ differ from each other by an angle no greater than 2 degrees and angles α and γ are equal to or less than 10 degrees.